Ключевые слова: abstract, art, atom, atomic, background, biochemistry, biology, chemical, chemistry, color, colorful, composition, compound, contour, design, drawing, drug, education, element, formula, graphic, icon, illustration, isolated, line, linear, lineart, logo, logotype, medical, medicine, model, molecular, molecule, organic, outline, research, science, scientific, skeletal, structural, structure, substance, symbol, technology,